Thomas H. Murray, president of the Hastings Center, a bioethics research group in Garrison, N.Y., spends a large part of his day considering the culture, philosophy and ethics of the sporting world. As the author of several papers on the use of science in sports, Dr. Murray, a social...

The moment the little boy was born, the hospital staff knew there was something unusual about him. His muscles looked nothing like the soft baby muscles of the other infants in the nursery. They were bulging and well defined, especially in his thighs and upper arms. ''Everybody noticed,'' said...